*{
    margin: 0;
    padding: 0;
}
ul li{
    list-style: none;
}
body{
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background-color: #000;
    
}
ul{
    display: flex;
    height: 200px; 
}
li{
    width: 20px;
    height: 20px;
    border-radius: 10px;
    margin-right: 20px;
}
li:nth-child(1){
    background-color: red;
    animation: love1 4s 0s infinite;
}
li:nth-child(2){
    background-color: yellow;
    animation: love2 4s 0.2s infinite;
}
li:nth-child(3){
    background-color: greenyellow;
    animation: love3 4s 0.4s infinite;
}
li:nth-child(4){
    background-color: palevioletred;
    animation: love4 4s 0.8s infinite;
}
li:nth-child(5){
    background-color: blueviolet;
    animation: love5 4s 1s infinite;
}
li:nth-child(6){
    background-color: orangered;
    animation: love4 4s 1.2s infinite;
}
li:nth-child(7){
    background-color: deeppink;
    animation: love3 4s 1.2s infinite;
}
li:nth-child(8){
    background-color: lawngreen;
    animation: love2 4s 1.6s infinite;
}
li:nth-child(9){
    background-color: turquoise;
    animation: love1 4s 1.8s infinite;
}

@keyframes love1{
    30%, 50%{
        height: 60px;
        transform: translateY(-30px)
    }
    70%, 100%{
        height: 0px;
        transform: translateY(0px)
    }
}
@keyframes love2{
    30%, 50%{
        height: 125px;
        transform: translateY(-60px)
    }
    70%, 100%{
        height: 0px;
        transform: translateY(0px)
    }
}
@keyframes love3{
    30%, 50%{
        height: 160px;
        transform: translateY(-65px)
    }
    70%, 100%{
        height: 0px;
        transform: translateY(0px)
    }
}
@keyframes love4{
    30%, 50%{
        height: 180px;
        transform: translateY(-60px)
    }
    70%, 100%{
        height: 0px;
        transform: translateY(0px)
    }
}
@keyframes love5{
    30%, 50%{
        height: 200px;
        transform: translateY(-45px)
    }
    70%, 100%{
        height: 0px;
        transform: translateY(0px)
    }
}